3 * Copyright (C) 1999 Kunihiro Ishiguro
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Zebra; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
31 /*A macro to check pointers in order to not
32 go behind the allocated mem block
34 Z -- size of data to be written
37 #define CHECK_SIZE(S, Z) \
38 if (((S)->putp + (Z)) > (S)->size) \
39 (Z) = (S)->size - (S)->putp;
41 /* Stream is fixed length buffer for network output/input. */
43 /* Make stream buffer. */
45 stream_new (size_t size)
49 s = XCALLOC (MTYPE_STREAM, sizeof (struct stream));
51 s->data = XCALLOC (MTYPE_STREAM_DATA, size);
58 stream_free (struct stream *s)
60 XFREE (MTYPE_STREAM_DATA, s->data);
61 XFREE (MTYPE_STREAM, s);
66 stream_get_getp (struct stream *s)
72 stream_get_putp (struct stream *s)
78 stream_get_endp (struct stream *s)
84 stream_get_size (struct stream *s)
89 /* Stream structre' stream pointer related functions. */
91 stream_set_getp (struct stream *s, unsigned long pos)
97 stream_set_putp (struct stream *s, unsigned long pos)
102 /* Forward pointer. */
104 stream_forward (struct stream *s, int size)
109 /* Copy from stream to destination. */
111 stream_get (void *dst, struct stream *s, size_t size)
113 memcpy (dst, s->data + s->getp, size);
117 /* Get next character from the stream. */
119 stream_getc (struct stream *s)
123 c = s->data[s->getp];
129 /* Get next character from the stream. */
131 stream_getc_from (struct stream *s, unsigned long from)
138 #endif /* BRCM_SUPPORT */
139 /* Get next word from the stream. */
141 stream_getw (struct stream *s)
145 w = s->data[s->getp++] << 8;
146 w |= s->data[s->getp++];
151 /* Get next word from the stream. */
153 stream_getw_from (struct stream *s, unsigned long from)
157 w = s->data[from++] << 8;
161 #endif /* BRCM_SUPPORT */
163 /* Get next long word from the stream. */
165 stream_getl (struct stream *s)
169 l = s->data[s->getp++] << 24;
170 l |= s->data[s->getp++] << 16;
171 l |= s->data[s->getp++] << 8;
172 l |= s->data[s->getp++];
176 /* Get next long word from the stream. */
178 stream_get_ipv4 (struct stream *s)
182 memcpy (&l, s->data + s->getp, 4);
188 /* Copy to source to stream. */
190 stream_put (struct stream *s, void *src, size_t size)
196 memcpy (s->data + s->putp, src, size);
198 memset (s->data + s->putp, 0, size);
201 if (s->putp > s->endp)
205 /* Put character to the stream. */
207 stream_putc (struct stream *s, u_char c)
209 if (s->putp >= s->size) return 0;
211 s->data[s->putp] = c;
213 if (s->putp > s->endp)
218 /* Put word to the stream. */
220 stream_putw (struct stream *s, u_int16_t w)
222 if ((s->size - s->putp) < 2) return 0;
224 s->data[s->putp++] = (u_char)(w >> 8);
225 s->data[s->putp++] = (u_char) w;
227 if (s->putp > s->endp)
232 /* Put long word to the stream. */
234 stream_putl (struct stream *s, u_int32_t l)
236 if ((s->size - s->putp) < 4) return 0;
238 s->data[s->putp++] = (u_char)(l >> 24);
239 s->data[s->putp++] = (u_char)(l >> 16);
240 s->data[s->putp++] = (u_char)(l >> 8);
241 s->data[s->putp++] = (u_char)l;
243 if (s->putp > s->endp)
249 stream_putc_at (struct stream *s, unsigned long putp, u_char c)
256 stream_putw_at (struct stream *s, unsigned long putp, u_int16_t w)
258 s->data[putp] = (u_char)(w >> 8);
259 s->data[putp + 1] = (u_char) w;
264 stream_putl_at (struct stream *s, unsigned long putp, u_int32_t l)
266 s->data[putp] = (u_char)(l >> 24);
267 s->data[putp + 1] = (u_char)(l >> 16);
268 s->data[putp + 2] = (u_char)(l >> 8);
269 s->data[putp + 3] = (u_char)l;
273 /* Put long word to the stream. */
275 stream_put_ipv4 (struct stream *s, u_int32_t l)
277 if ((s->size - s->putp) < 4)
280 memcpy (s->data + s->putp, &l, 4);
283 if (s->putp > s->endp)
288 /* Put long word to the stream. */
290 stream_put_in_addr (struct stream *s, struct in_addr *addr)
292 if ((s->size - s->putp) < 4)
295 memcpy (s->data + s->putp, addr, 4);
298 if (s->putp > s->endp)
304 /* Put prefix by nlri type format. */
306 stream_put_prefix (struct stream *s, struct prefix *p)
310 psize = PSIZE (p->prefixlen);
312 if ((s->size - s->putp) < psize) return 0;
314 stream_putc (s, p->prefixlen);
315 memcpy (s->data + s->putp, &p->u.prefix, psize);
318 if (s->putp > s->endp)
325 /* Read size from fd. */
327 stream_read (struct stream *s, int fd, size_t size)
331 nbytes = readn (fd, s->data + s->putp, size);
341 /* Read size from fd. */
343 stream_read_unblock (struct stream *s, int fd, size_t size)
348 val = fcntl (fd, F_GETFL, 0);
349 fcntl (fd, F_SETFL, val|O_NONBLOCK);
350 nbytes = read (fd, s->data + s->putp, size);
351 fcntl (fd, F_SETFL, val);
361 /* Write data to buffer. */
363 stream_write (struct stream *s, u_char *ptr, size_t size)
368 memcpy (s->data + s->putp, ptr, size);
370 if (s->putp > s->endp)
375 /* Return current read pointer. */
377 stream_pnt (struct stream *s)
379 return s->data + s->getp;
382 /* Check does this stream empty? */
384 stream_empty (struct stream *s)
386 if (s->putp == 0 && s->endp == 0 && s->getp == 0)
391 #endif /* BRCM_SUPPORT */
394 stream_reset (struct stream *s)
401 /* Write stream contens to the file discriptor. */
403 stream_flush (struct stream *s, int fd)
407 nbytes = write (fd, s->data + s->getp, s->endp - s->getp);
413 /* Stream first in first out queue. */
418 struct stream_fifo *new;
420 new = XCALLOC (MTYPE_STREAM_FIFO, sizeof (struct stream_fifo));
424 /* Add new stream to fifo. */
426 stream_fifo_push (struct stream_fifo *fifo, struct stream *s)
429 fifo->tail->next = s;
438 /* Delete first stream from fifo. */
440 stream_fifo_pop (struct stream_fifo *fifo)
448 fifo->head = s->next;
450 if (fifo->head == NULL)
459 /* Return first fifo entry. */
461 stream_fifo_head (struct stream_fifo *fifo)
467 stream_fifo_clean (struct stream_fifo *fifo)
472 for (s = fifo->head; s; s = next)
477 fifo->head = fifo->tail = NULL;
482 stream_fifo_free (struct stream_fifo *fifo)
484 stream_fifo_clean (fifo);
485 XFREE (MTYPE_STREAM_FIFO, fifo);